Bitmap之安卓手机壁纸的设置

MainActivity:

package com.hyzhou.imagedemo;

import java.io.File;

import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//设置当前Activity界面布局
		setContentView(R.layout.activity_main);
		//SD卡路径
		File sd=Environment.getExternalStorageDirectory();
		String path=sd.getPath()+"/image/zhizhi.jpg";
		//通过BitmapFactory获得Bitmap实例
		Bitmap bm=BitmapFactory.decodeFile(path);
		try {
			//设置桌面
			setWallpaper(bm);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}

注意：一定要记得在Android Manifest.xml中加入下面语句，声明拥有修改壁纸的权限，不然setWallpaper()方法不起作用

<uses-permission  android:name="android.permission.SET_WALLPAPER"/>